The RipAC and RipU T3E loci are incongruence hotspots. A. Genomic map of the ripAC locus in representative strains of the four phylotypes from the RSSC and phylogenetic relationships of ripAC and its flanking genes. Arrows of same colour symbolize orthologous genes. B. Similar analysis as above for ripU. RSSC strains are color-coded according to their phylotype goup: Red for phylotype 1 and 3; Blue for phylotype 2 and green for phylotype 4 and related strains.